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All results from a given calculation for HCCCN (Cyanoacetylene)

using model chemistry: HF/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C*V 1Σ
Energy calculated at HF/6-31+G**
 hartrees
Energy at 0K-168.557146
Energy at 298.15K-168.556780
Nuclear repulsion energy77.526798
The energy at 298.15K was derived from the energy at 0K and an integrated heat capacity that used the calculated vibrational frequencies.
Vibrational Frequencies calculated at HF/6-31+G**
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 Σ 3632 3284 81.79      
2 Σ 2643 2390 53.29      
3 Σ 2373 2145 1.24      
4 Σ 934 844 0.00      
5 Π 878 794 52.77      
5 Π 878 794 52.77      
6 Π 655 592 15.76      
6 Π 655 592 15.76      
7 Π 278 251 0.03      
7 Π 278 251 0.03      

Unscaled Zero Point Vibrational Energy (zpe) 6602.0 cm-1
Scaled (by 0.9042) Zero Point Vibrational Energy (zpe) 5969.6 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at HF/6-31+G**
B
0.15344

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/6-31+G**

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 1.887
C2 0.000 0.000 0.750
C3 0.000 0.000 -0.642
C4 0.000 0.000 -1.828
H5 0.000 0.000 -2.887

Atom - Atom Distances (Å)
  N1 C2 C3 C4 H5
N11.13652.52813.71474.7731
C21.13651.39152.57823.6366
C32.52811.39151.18662.2450
C43.71472.57821.18661.0584
H54.77313.63662.24501.0584

picture of Cyanoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C2 C3 180.000 C2 C3 C4 180.000
C3 C4 H5 180.000
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.427      
2 C -0.904      
3 C 0.339      
4 C 0.660      
5 H 0.332      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 -4.143 4.143
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -23.171 0.000 0.000
y 0.000 -23.171 0.000
z 0.000 0.000 -21.109
Traceless
 xyz
x -1.031 0.000 0.000
y 0.000 -1.031 0.000
z 0.000 0.000 2.062
Polar
3z2-r24.123
x2-y20.000
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.594 0.000 0.000
y 0.000 2.594 0.000
z 0.000 0.000 9.433


<r2> (average value of r2) Å2
<r2> 0.000
(<r2>)1/2 0.000